Amin Asfour was killed in the crash and his cousin is still in hospital with serious head injuries.

ABC News

A 23-year-old man has been charged over a street race in Sydney's south-west that resulted in the death of a teenager.

Social media was awash with tributes to Amin Asfour after he died in the crash on the Hume Highway at Greenacre nine days ago.

The 18-year-old was a passenger in a Mitsubishi Lancer being driven by his cousin during a street race with a red Nissan Pulsar.

The two cars collided and spun into two other vehicles driving towards them on the highway.

Mr Asfour died at the scene and his cousin, also 18, remains in hospital with serious head injuries.

Police say the man behind the wheel of the Pulsar was driving with a suspended licence.

He has now been charged with dangerous driving occasioning death and grievous bodily harm, negligent driving occasioning death, driving while suspended, drug possession and a charge relating to high-performance vehicles.

The man was released on bail to face Bankstown Local Court next month.